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A291541
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a(n) = prime(n) * prime(n^2) - prime(n^3).
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6
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2, 2, 12, 60, 376, 642, 1550, 2238, 4118, 7770, 9534, 15846, 21966, 26490, 35750, 46934, 63204, 73164, 94248, 112812, 128922, 161128, 185576, 225062, 278260, 315108, 347596, 393898, 426998, 478078, 614064, 682998, 769800, 827466, 962166, 1036806, 1156866, 1286448, 1390878, 1534754
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OFFSET
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1,1
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COMMENTS
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All terms are even.
For prime(n)^3 - prime(n^3) see A262199.
For prime(n)^3 - prime(n) * prime(n^2) see A291542.
For PrimePi(n^3) - PrimePi(n) * PrimePi(n^2) see A291539.
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LINKS
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FORMULA
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EXAMPLE
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a(2) = prime(2) * prime(4) - prime(8) = 3*7 - 19 = 2.
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MATHEMATICA
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Table[ Prime[n] * Prime[n^2] - Prime[n^3], {n, 40}]
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PROG
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(PARI) a(n) = prime(n) * prime(n^2) - prime(n^3); \\ Michel Marcus, Sep 10 2017
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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